David Hinckley

Tim Goodman

O'Brien's debut was pretty much what one would expect from these kind of pre-hyped events. It was both funny and forced and the expectations of - what, exactly?--never seemed to materialize, even though Will Ferrell as the sole guest tried to drum something up and Pearl Jam, as the musical guest, at least kick-started an aural ruckus.

Randee Dawn

Alan Sepinwall

Conan was simultaneously reassuring his fans that he wasn't going to change too much in the new gig, and telling the traditional Tonight audience what they might expect from the new landlord. This was the smart, and really only, play Conan could make on night one of such a high-profile job. I just wish the execution had been a little better.